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a2af421f AVL |
1 | /***************************************************************************** |
2 | * | |
3 | * Filename: kingsun-sir.c | |
4 | * Version: 0.1.1 | |
5 | * Description: Irda KingSun/DonShine USB Dongle | |
6 | * Status: Experimental | |
66f5e51e | 7 | * Author: Alex Villacís Lasso <a_villacis@palosanto.com> |
a2af421f AVL |
8 | * |
9 | * Based on stir4200 and mcs7780 drivers, with (strange?) differences | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
24 | *****************************************************************************/ | |
25 | ||
26 | /* | |
27 | * This is my current (2007-04-25) understanding of how this dongle is supposed | |
28 | * to work. This is based on reverse-engineering and examination of the packet | |
29 | * data sent and received by the WinXP driver using USBSnoopy. Feel free to | |
30 | * update here as more of this dongle is known: | |
31 | * | |
32 | * General: Unlike the other USB IrDA dongles, this particular dongle exposes, | |
33 | * not two bulk (in and out) endpoints, but two *interrupt* ones. This dongle, | |
34 | * like the bulk based ones (stir4200.c and mcs7780.c), requires polling in | |
35 | * order to receive data. | |
36 | * Transmission: Just like stir4200, this dongle uses a raw stream of data, | |
37 | * which needs to be wrapped and escaped in a similar way as in stir4200.c. | |
38 | * Reception: Poll-based, as in stir4200. Each read returns the contents of a | |
39 | * 8-byte buffer, of which the first byte (LSB) indicates the number of bytes | |
40 | * (1-7) of valid data contained within the remaining 7 bytes. For example, if | |
41 | * the buffer had the following contents: | |
42 | * 06 ff ff ff c0 01 04 aa | |
43 | * This means that (06) there are 6 bytes of valid data. The byte 0xaa at the | |
44 | * end is garbage (left over from a previous reception) and is discarded. | |
45 | * If a read returns an "impossible" value as the length of valid data (such as | |
46 | * 0x36) in the first byte, then the buffer is uninitialized (as is the case of | |
47 | * first plug-in) and its contents should be discarded. There is currently no | |
48 | * evidence that the top 5 bits of the 1st byte of the buffer can have values | |
49 | * other than 0 once reception begins. | |
50 | * Once valid bytes are collected, the assembled stream is a sequence of | |
51 | * wrapped IrDA frames that is unwrapped and unescaped as in stir4200.c. | |
52 | * BIG FAT WARNING: the dongle does *not* reset the RX buffer in any way after | |
53 | * a successful read from the host, which means that in absence of further | |
54 | * reception, repeated reads from the dongle will return the exact same | |
55 | * contents repeatedly. Attempts to be smart and cache a previous read seem | |
56 | * to result in corrupted packets, so this driver depends on the unwrap logic | |
57 | * to sort out any repeated reads. | |
58 | * Speed change: no commands observed so far to change speed, assumed fixed | |
59 | * 9600bps (SIR). | |
60 | */ | |
61 | ||
62 | #include <linux/module.h> | |
63 | #include <linux/moduleparam.h> | |
64 | #include <linux/kernel.h> | |
65 | #include <linux/types.h> | |
66 | #include <linux/errno.h> | |
67 | #include <linux/init.h> | |
68 | #include <linux/slab.h> | |
a2af421f AVL |
69 | #include <linux/kref.h> |
70 | #include <linux/usb.h> | |
71 | #include <linux/device.h> | |
72 | #include <linux/crc32.h> | |
73 | ||
74 | #include <asm/unaligned.h> | |
75 | #include <asm/byteorder.h> | |
76 | #include <asm/uaccess.h> | |
77 | ||
78 | #include <net/irda/irda.h> | |
79 | #include <net/irda/wrapper.h> | |
80 | #include <net/irda/crc.h> | |
81 | ||
82 | /* | |
83 | * According to lsusb, 0x07c0 is assigned to | |
84 | * "Code Mercenaries Hard- und Software GmbH" | |
85 | */ | |
86 | #define KING_VENDOR_ID 0x07c0 | |
87 | #define KING_PRODUCT_ID 0x4200 | |
88 | ||
89 | /* These are the currently known USB ids */ | |
90 | static struct usb_device_id dongles[] = { | |
91 | /* KingSun Co,Ltd IrDA/USB Bridge */ | |
92 | { USB_DEVICE(KING_VENDOR_ID, KING_PRODUCT_ID) }, | |
93 | { } | |
94 | }; | |
95 | ||
96 | MODULE_DEVICE_TABLE(usb, dongles); | |
97 | ||
98 | #define KINGSUN_MTT 0x07 | |
99 | ||
100 | #define KINGSUN_FIFO_SIZE 4096 | |
101 | #define KINGSUN_EP_IN 0 | |
102 | #define KINGSUN_EP_OUT 1 | |
103 | ||
104 | struct kingsun_cb { | |
105 | struct usb_device *usbdev; /* init: probe_irda */ | |
106 | struct net_device *netdev; /* network layer */ | |
107 | struct irlap_cb *irlap; /* The link layer we are binded to */ | |
af049081 | 108 | |
a2af421f AVL |
109 | struct qos_info qos; |
110 | ||
111 | __u8 *in_buf; /* receive buffer */ | |
112 | __u8 *out_buf; /* transmit buffer */ | |
113 | __u8 max_rx; /* max. atomic read from dongle | |
114 | (usually 8), also size of in_buf */ | |
115 | __u8 max_tx; /* max. atomic write to dongle | |
116 | (usually 8) */ | |
117 | ||
118 | iobuff_t rx_buff; /* receive unwrap state machine */ | |
119 | struct timeval rx_time; | |
120 | spinlock_t lock; | |
121 | int receiving; | |
122 | ||
123 | __u8 ep_in; | |
124 | __u8 ep_out; | |
125 | ||
126 | struct urb *tx_urb; | |
127 | struct urb *rx_urb; | |
128 | }; | |
129 | ||
130 | /* Callback transmission routine */ | |
131 | static void kingsun_send_irq(struct urb *urb) | |
132 | { | |
133 | struct kingsun_cb *kingsun = urb->context; | |
134 | struct net_device *netdev = kingsun->netdev; | |
135 | ||
136 | /* in process of stopping, just drop data */ | |
137 | if (!netif_running(kingsun->netdev)) { | |
138 | err("kingsun_send_irq: Network not running!"); | |
139 | return; | |
140 | } | |
141 | ||
142 | /* unlink, shutdown, unplug, other nasties */ | |
143 | if (urb->status != 0) { | |
144 | err("kingsun_send_irq: urb asynchronously failed - %d", | |
145 | urb->status); | |
146 | } | |
147 | netif_wake_queue(netdev); | |
148 | } | |
149 | ||
150 | /* | |
151 | * Called from net/core when new frame is available. | |
152 | */ | |
153 | static int kingsun_hard_xmit(struct sk_buff *skb, struct net_device *netdev) | |
154 | { | |
155 | struct kingsun_cb *kingsun; | |
156 | int wraplen; | |
157 | int ret = 0; | |
158 | ||
159 | if (skb == NULL || netdev == NULL) | |
160 | return -EINVAL; | |
161 | ||
162 | netif_stop_queue(netdev); | |
163 | ||
164 | /* the IRDA wrapping routines don't deal with non linear skb */ | |
165 | SKB_LINEAR_ASSERT(skb); | |
166 | ||
167 | kingsun = netdev_priv(netdev); | |
168 | ||
169 | spin_lock(&kingsun->lock); | |
170 | ||
171 | /* Append data to the end of whatever data remains to be transmitted */ | |
172 | wraplen = async_wrap_skb(skb, | |
173 | kingsun->out_buf, | |
174 | KINGSUN_FIFO_SIZE); | |
175 | ||
176 | /* Calculate how much data can be transmitted in this urb */ | |
177 | usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev, | |
178 | usb_sndintpipe(kingsun->usbdev, kingsun->ep_out), | |
179 | kingsun->out_buf, wraplen, kingsun_send_irq, | |
180 | kingsun, 1); | |
181 | ||
182 | if ((ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC))) { | |
183 | err("kingsun_hard_xmit: failed tx_urb submit: %d", ret); | |
184 | switch (ret) { | |
185 | case -ENODEV: | |
186 | case -EPIPE: | |
187 | break; | |
188 | default: | |
af049081 | 189 | netdev->stats.tx_errors++; |
a2af421f AVL |
190 | netif_start_queue(netdev); |
191 | } | |
192 | } else { | |
af049081 SH |
193 | netdev->stats.tx_packets++; |
194 | netdev->stats.tx_bytes += skb->len; | |
a2af421f AVL |
195 | } |
196 | ||
197 | dev_kfree_skb(skb); | |
198 | spin_unlock(&kingsun->lock); | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
203 | /* Receive callback function */ | |
204 | static void kingsun_rcv_irq(struct urb *urb) | |
205 | { | |
206 | struct kingsun_cb *kingsun = urb->context; | |
207 | int ret; | |
208 | ||
209 | /* in process of stopping, just drop data */ | |
210 | if (!netif_running(kingsun->netdev)) { | |
211 | kingsun->receiving = 0; | |
212 | return; | |
213 | } | |
214 | ||
215 | /* unlink, shutdown, unplug, other nasties */ | |
216 | if (urb->status != 0) { | |
217 | err("kingsun_rcv_irq: urb asynchronously failed - %d", | |
218 | urb->status); | |
219 | kingsun->receiving = 0; | |
220 | return; | |
221 | } | |
222 | ||
223 | if (urb->actual_length == kingsun->max_rx) { | |
224 | __u8 *bytes = urb->transfer_buffer; | |
225 | int i; | |
226 | ||
227 | /* The very first byte in the buffer indicates the length of | |
228 | valid data in the read. This byte must be in the range | |
229 | 1..kingsun->max_rx -1 . Values outside this range indicate | |
230 | an uninitialized Rx buffer when the dongle has just been | |
231 | plugged in. */ | |
232 | if (bytes[0] >= 1 && bytes[0] < kingsun->max_rx) { | |
233 | for (i = 1; i <= bytes[0]; i++) { | |
234 | async_unwrap_char(kingsun->netdev, | |
af049081 | 235 | &kingsun->netdev->stats, |
a2af421f AVL |
236 | &kingsun->rx_buff, bytes[i]); |
237 | } | |
a2af421f AVL |
238 | do_gettimeofday(&kingsun->rx_time); |
239 | kingsun->receiving = | |
240 | (kingsun->rx_buff.state != OUTSIDE_FRAME) | |
241 | ? 1 : 0; | |
242 | } | |
243 | } else if (urb->actual_length > 0) { | |
244 | err("%s(): Unexpected response length, expected %d got %d", | |
a97a6f10 | 245 | __func__, kingsun->max_rx, urb->actual_length); |
a2af421f AVL |
246 | } |
247 | /* This urb has already been filled in kingsun_net_open */ | |
248 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
249 | } | |
250 | ||
251 | /* | |
252 | * Function kingsun_net_open (dev) | |
253 | * | |
254 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
255 | */ | |
256 | static int kingsun_net_open(struct net_device *netdev) | |
257 | { | |
258 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
259 | int err = -ENOMEM; | |
260 | char hwname[16]; | |
261 | ||
262 | /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */ | |
263 | kingsun->receiving = 0; | |
264 | ||
265 | /* Initialize for SIR to copy data directly into skb. */ | |
266 | kingsun->rx_buff.in_frame = FALSE; | |
267 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
268 | kingsun->rx_buff.truesize = IRDA_SKB_MAX_MTU; | |
269 | kingsun->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
270 | if (!kingsun->rx_buff.skb) | |
271 | goto free_mem; | |
272 | ||
273 | skb_reserve(kingsun->rx_buff.skb, 1); | |
274 | kingsun->rx_buff.head = kingsun->rx_buff.skb->data; | |
275 | do_gettimeofday(&kingsun->rx_time); | |
276 | ||
277 | kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
278 | if (!kingsun->rx_urb) | |
279 | goto free_mem; | |
280 | ||
281 | kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
282 | if (!kingsun->tx_urb) | |
283 | goto free_mem; | |
284 | ||
285 | /* | |
286 | * Now that everything should be initialized properly, | |
287 | * Open new IrLAP layer instance to take care of us... | |
288 | */ | |
289 | sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); | |
290 | kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); | |
291 | if (!kingsun->irlap) { | |
292 | err("kingsun-sir: irlap_open failed"); | |
293 | goto free_mem; | |
294 | } | |
295 | ||
296 | /* Start first reception */ | |
297 | usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, | |
298 | usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), | |
299 | kingsun->in_buf, kingsun->max_rx, | |
300 | kingsun_rcv_irq, kingsun, 1); | |
301 | kingsun->rx_urb->status = 0; | |
302 | err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
303 | if (err) { | |
304 | err("kingsun-sir: first urb-submit failed: %d", err); | |
305 | goto close_irlap; | |
306 | } | |
307 | ||
308 | netif_start_queue(netdev); | |
309 | ||
310 | /* Situation at this point: | |
311 | - all work buffers allocated | |
312 | - urbs allocated and ready to fill | |
313 | - max rx packet known (in max_rx) | |
314 | - unwrap state machine initialized, in state outside of any frame | |
315 | - receive request in progress | |
316 | - IrLAP layer started, about to hand over packets to send | |
317 | */ | |
318 | ||
319 | return 0; | |
320 | ||
321 | close_irlap: | |
322 | irlap_close(kingsun->irlap); | |
323 | free_mem: | |
324 | if (kingsun->tx_urb) { | |
325 | usb_free_urb(kingsun->tx_urb); | |
326 | kingsun->tx_urb = NULL; | |
327 | } | |
328 | if (kingsun->rx_urb) { | |
329 | usb_free_urb(kingsun->rx_urb); | |
330 | kingsun->rx_urb = NULL; | |
331 | } | |
332 | if (kingsun->rx_buff.skb) { | |
333 | kfree_skb(kingsun->rx_buff.skb); | |
334 | kingsun->rx_buff.skb = NULL; | |
335 | kingsun->rx_buff.head = NULL; | |
336 | } | |
337 | return err; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Function kingsun_net_close (kingsun) | |
342 | * | |
343 | * Network device is taken down. Usually this is done by | |
344 | * "ifconfig irda0 down" | |
345 | */ | |
346 | static int kingsun_net_close(struct net_device *netdev) | |
347 | { | |
348 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
349 | ||
350 | /* Stop transmit processing */ | |
351 | netif_stop_queue(netdev); | |
352 | ||
353 | /* Mop up receive && transmit urb's */ | |
354 | usb_kill_urb(kingsun->tx_urb); | |
355 | usb_kill_urb(kingsun->rx_urb); | |
356 | ||
357 | usb_free_urb(kingsun->tx_urb); | |
358 | usb_free_urb(kingsun->rx_urb); | |
359 | ||
360 | kingsun->tx_urb = NULL; | |
361 | kingsun->rx_urb = NULL; | |
362 | ||
363 | kfree_skb(kingsun->rx_buff.skb); | |
364 | kingsun->rx_buff.skb = NULL; | |
365 | kingsun->rx_buff.head = NULL; | |
366 | kingsun->rx_buff.in_frame = FALSE; | |
367 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
368 | kingsun->receiving = 0; | |
369 | ||
370 | /* Stop and remove instance of IrLAP */ | |
371 | if (kingsun->irlap) | |
372 | irlap_close(kingsun->irlap); | |
373 | ||
374 | kingsun->irlap = NULL; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * IOCTLs : Extra out-of-band network commands... | |
381 | */ | |
382 | static int kingsun_net_ioctl(struct net_device *netdev, struct ifreq *rq, | |
383 | int cmd) | |
384 | { | |
385 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
386 | struct kingsun_cb *kingsun = netdev_priv(netdev); | |
387 | int ret = 0; | |
388 | ||
389 | switch (cmd) { | |
390 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
391 | if (!capable(CAP_NET_ADMIN)) | |
392 | return -EPERM; | |
393 | ||
394 | /* Check if the device is still there */ | |
395 | if (netif_device_present(kingsun->netdev)) | |
396 | /* No observed commands for speed change */ | |
397 | ret = -EOPNOTSUPP; | |
398 | break; | |
399 | ||
400 | case SIOCSMEDIABUSY: /* Set media busy */ | |
401 | if (!capable(CAP_NET_ADMIN)) | |
402 | return -EPERM; | |
403 | ||
404 | /* Check if the IrDA stack is still there */ | |
405 | if (netif_running(kingsun->netdev)) | |
406 | irda_device_set_media_busy(kingsun->netdev, TRUE); | |
407 | break; | |
408 | ||
409 | case SIOCGRECEIVING: | |
410 | /* Only approximately true */ | |
411 | irq->ifr_receiving = kingsun->receiving; | |
412 | break; | |
413 | ||
414 | default: | |
415 | ret = -EOPNOTSUPP; | |
416 | } | |
417 | ||
418 | return ret; | |
419 | } | |
420 | ||
a2af421f AVL |
421 | |
422 | /* | |
423 | * This routine is called by the USB subsystem for each new device | |
424 | * in the system. We need to check if the device is ours, and in | |
425 | * this case start handling it. | |
426 | */ | |
427 | static int kingsun_probe(struct usb_interface *intf, | |
428 | const struct usb_device_id *id) | |
429 | { | |
430 | struct usb_host_interface *interface; | |
431 | struct usb_endpoint_descriptor *endpoint; | |
432 | ||
433 | struct usb_device *dev = interface_to_usbdev(intf); | |
434 | struct kingsun_cb *kingsun = NULL; | |
435 | struct net_device *net = NULL; | |
436 | int ret = -ENOMEM; | |
437 | int pipe, maxp_in, maxp_out; | |
438 | __u8 ep_in; | |
439 | __u8 ep_out; | |
440 | ||
441 | /* Check that there really are two interrupt endpoints. | |
442 | Check based on the one in drivers/usb/input/usbmouse.c | |
443 | */ | |
444 | interface = intf->cur_altsetting; | |
445 | if (interface->desc.bNumEndpoints != 2) { | |
446 | err("kingsun-sir: expected 2 endpoints, found %d", | |
447 | interface->desc.bNumEndpoints); | |
448 | return -ENODEV; | |
449 | } | |
450 | endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; | |
451 | if (!usb_endpoint_is_int_in(endpoint)) { | |
452 | err("kingsun-sir: endpoint 0 is not interrupt IN"); | |
453 | return -ENODEV; | |
454 | } | |
455 | ||
456 | ep_in = endpoint->bEndpointAddress; | |
457 | pipe = usb_rcvintpipe(dev, ep_in); | |
458 | maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
459 | if (maxp_in > 255 || maxp_in <= 1) { | |
460 | err("%s: endpoint 0 has max packet size %d not in range", | |
461 | __FILE__, maxp_in); | |
462 | return -ENODEV; | |
463 | } | |
464 | ||
465 | endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; | |
466 | if (!usb_endpoint_is_int_out(endpoint)) { | |
467 | err("kingsun-sir: endpoint 1 is not interrupt OUT"); | |
468 | return -ENODEV; | |
469 | } | |
470 | ||
471 | ep_out = endpoint->bEndpointAddress; | |
472 | pipe = usb_sndintpipe(dev, ep_out); | |
473 | maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
474 | ||
475 | /* Allocate network device container. */ | |
476 | net = alloc_irdadev(sizeof(*kingsun)); | |
477 | if(!net) | |
478 | goto err_out1; | |
479 | ||
a2af421f AVL |
480 | SET_NETDEV_DEV(net, &intf->dev); |
481 | kingsun = netdev_priv(net); | |
482 | kingsun->irlap = NULL; | |
483 | kingsun->tx_urb = NULL; | |
484 | kingsun->rx_urb = NULL; | |
485 | kingsun->ep_in = ep_in; | |
486 | kingsun->ep_out = ep_out; | |
487 | kingsun->in_buf = NULL; | |
488 | kingsun->out_buf = NULL; | |
489 | kingsun->max_rx = (__u8)maxp_in; | |
490 | kingsun->max_tx = (__u8)maxp_out; | |
491 | kingsun->netdev = net; | |
492 | kingsun->usbdev = dev; | |
493 | kingsun->rx_buff.in_frame = FALSE; | |
494 | kingsun->rx_buff.state = OUTSIDE_FRAME; | |
495 | kingsun->rx_buff.skb = NULL; | |
496 | kingsun->receiving = 0; | |
497 | spin_lock_init(&kingsun->lock); | |
498 | ||
499 | /* Allocate input buffer */ | |
901ded25 | 500 | kingsun->in_buf = kmalloc(kingsun->max_rx, GFP_KERNEL); |
a2af421f AVL |
501 | if (!kingsun->in_buf) |
502 | goto free_mem; | |
503 | ||
504 | /* Allocate output buffer */ | |
901ded25 | 505 | kingsun->out_buf = kmalloc(KINGSUN_FIFO_SIZE, GFP_KERNEL); |
a2af421f AVL |
506 | if (!kingsun->out_buf) |
507 | goto free_mem; | |
508 | ||
509 | printk(KERN_INFO "KingSun/DonShine IRDA/USB found at address %d, " | |
510 | "Vendor: %x, Product: %x\n", | |
511 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
512 | le16_to_cpu(dev->descriptor.idProduct)); | |
513 | ||
514 | /* Initialize QoS for this device */ | |
515 | irda_init_max_qos_capabilies(&kingsun->qos); | |
516 | ||
517 | /* That's the Rx capability. */ | |
518 | kingsun->qos.baud_rate.bits &= IR_9600; | |
519 | kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; | |
520 | irda_qos_bits_to_value(&kingsun->qos); | |
521 | ||
522 | /* Override the network functions we need to use */ | |
523 | net->hard_start_xmit = kingsun_hard_xmit; | |
524 | net->open = kingsun_net_open; | |
525 | net->stop = kingsun_net_close; | |
a2af421f AVL |
526 | net->do_ioctl = kingsun_net_ioctl; |
527 | ||
528 | ret = register_netdev(net); | |
529 | if (ret != 0) | |
530 | goto free_mem; | |
531 | ||
880c9c66 GKH |
532 | dev_info(&net->dev, "IrDA: Registered KingSun/DonShine device %s\n", |
533 | net->name); | |
a2af421f AVL |
534 | |
535 | usb_set_intfdata(intf, kingsun); | |
536 | ||
537 | /* Situation at this point: | |
538 | - all work buffers allocated | |
539 | - urbs not allocated, set to NULL | |
540 | - max rx packet known (in max_rx) | |
541 | - unwrap state machine (partially) initialized, but skb == NULL | |
542 | */ | |
543 | ||
544 | return 0; | |
545 | ||
546 | free_mem: | |
547 | if (kingsun->out_buf) kfree(kingsun->out_buf); | |
548 | if (kingsun->in_buf) kfree(kingsun->in_buf); | |
549 | free_netdev(net); | |
550 | err_out1: | |
551 | return ret; | |
552 | } | |
553 | ||
554 | /* | |
555 | * The current device is removed, the USB layer tell us to shut it down... | |
556 | */ | |
557 | static void kingsun_disconnect(struct usb_interface *intf) | |
558 | { | |
559 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
560 | ||
561 | if (!kingsun) | |
562 | return; | |
563 | ||
564 | unregister_netdev(kingsun->netdev); | |
565 | ||
566 | /* Mop up receive && transmit urb's */ | |
567 | if (kingsun->tx_urb != NULL) { | |
568 | usb_kill_urb(kingsun->tx_urb); | |
569 | usb_free_urb(kingsun->tx_urb); | |
570 | kingsun->tx_urb = NULL; | |
571 | } | |
572 | if (kingsun->rx_urb != NULL) { | |
573 | usb_kill_urb(kingsun->rx_urb); | |
574 | usb_free_urb(kingsun->rx_urb); | |
575 | kingsun->rx_urb = NULL; | |
576 | } | |
577 | ||
578 | kfree(kingsun->out_buf); | |
579 | kfree(kingsun->in_buf); | |
580 | free_netdev(kingsun->netdev); | |
581 | ||
582 | usb_set_intfdata(intf, NULL); | |
583 | } | |
584 | ||
585 | #ifdef CONFIG_PM | |
586 | /* USB suspend, so power off the transmitter/receiver */ | |
587 | static int kingsun_suspend(struct usb_interface *intf, pm_message_t message) | |
588 | { | |
589 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
590 | ||
591 | netif_device_detach(kingsun->netdev); | |
592 | if (kingsun->tx_urb != NULL) usb_kill_urb(kingsun->tx_urb); | |
593 | if (kingsun->rx_urb != NULL) usb_kill_urb(kingsun->rx_urb); | |
594 | return 0; | |
595 | } | |
596 | ||
597 | /* Coming out of suspend, so reset hardware */ | |
598 | static int kingsun_resume(struct usb_interface *intf) | |
599 | { | |
600 | struct kingsun_cb *kingsun = usb_get_intfdata(intf); | |
601 | ||
602 | if (kingsun->rx_urb != NULL) | |
603 | usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | |
604 | netif_device_attach(kingsun->netdev); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | #endif | |
609 | ||
610 | /* | |
611 | * USB device callbacks | |
612 | */ | |
613 | static struct usb_driver irda_driver = { | |
614 | .name = "kingsun-sir", | |
615 | .probe = kingsun_probe, | |
616 | .disconnect = kingsun_disconnect, | |
617 | .id_table = dongles, | |
618 | #ifdef CONFIG_PM | |
619 | .suspend = kingsun_suspend, | |
620 | .resume = kingsun_resume, | |
621 | #endif | |
622 | }; | |
623 | ||
624 | /* | |
625 | * Module insertion | |
626 | */ | |
627 | static int __init kingsun_init(void) | |
628 | { | |
629 | return usb_register(&irda_driver); | |
630 | } | |
631 | module_init(kingsun_init); | |
632 | ||
633 | /* | |
634 | * Module removal | |
635 | */ | |
636 | static void __exit kingsun_cleanup(void) | |
637 | { | |
638 | /* Deregister the driver and remove all pending instances */ | |
639 | usb_deregister(&irda_driver); | |
640 | } | |
641 | module_exit(kingsun_cleanup); | |
642 | ||
66f5e51e | 643 | MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); |
a2af421f AVL |
644 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun/DonShine"); |
645 | MODULE_LICENSE("GPL"); |